Not quite true, if you aren't looking to run games on any of them, you could actually get a Matrox card, which depending on the card can run between 4 to 8 displays. I'm not sure if it's more expensive then a graphics card that can run eyefinity, but we use a few at these at work to drive 2560 x 1600 displays without a hitch (again not for gaming).

It looks like a Matrox card will start to run you from 100$ and higher (according to shopbot).